Improvement in thill-couplings



UNITED STATES PATENT OFFICE..

GEORGE F. SMITH, OF PLANTSVILLE, CONNECTICUT.

IMPROVEMENT INTHILL-couPLlNcs.

Specification forming part of Letters Patent N0. 149,535, dated April 7,1874; application filed February 5, 1874.

hereby declare the following, when taken inV connection with theaccompanying drawings and the letters of reference marked thereon, to bea full, clear, and exact description of the same, and which saiddrawings constitute part of this specification, and represent, in

VFigure l, a side view; Fig. 2, a transverse section; and i n Fig. 3, alongitudinal section.

This invention relates to an improvement in the eyes by which the shaftsof a carriage are attached to the coupling, the object being tointroduce the elastic material for preventing the rattle in the shacklewithin the shaft-eye, and yet prevent the wear which would naturallycome upon the material in the movement ofthe shaft 5 and the inventionconsists in a cylinder or piece of elastic material within the eyecombined with a metal cylinder within the elastic material, andconnected with the eye, so that both the elastic material and innercylinder will be prevented from turning except with the shaftieye.

A is the shaft-eye formed on the iron B, in the usual manner externally.The eye is bored out larger than the diameter of the bolt C, by whichthe eye is secured to the coupling D. A sleeve or cylinder, E, (denotedin the solid black,) is formed from sheet or thin nietal. The internaldiameter is slightly less than that of the bolt C, so that the insertionof the bolt will slightly expand the cylinder. The material of which thecylinder is formed should be more or less elastic, and the externaldiameter of the cylinder E less than `the internal.

diameter of the eye, so as to leave a space be tween the two which isiilled with the elastic material d, so as to press the cylinder closeupon the bolt, and, by the expansion of the cylinder E, be compressed soas to be forced outward against the ears F of the coupling.

In order to prevent wear upon thevelastic material, I connect theinternal cylinder E with the eye, so that the cylinder will move on thebolt with the shaft-eye. This I prefer to do by turning one or bothedges of the internal cylinder out through a slit in the elasticmaterial into a groove or notch in the shafteye.

WhileI believe this to be `the best method of making the connection soas to prevent wear upon the surface of the elastic material, other meansof connection will be readily suggested to those skilled in the art.

yllhis construction prevents the eye from rattlin g either in thecoupling or on the bolt. The bolt should be made square through one earor the other, to prevent itfrom turning with the eye.

By this construction the elastic material is protected from all wear,the cylinder E only being exposed to that, and in case the cylindershould wear it is easily removed, but will last many times longer thanthe elastic ma. terial if exposed to the same wear.

I do not wish to be understood as claiming the introduction of theelastic or anti-rattling material within the shaft-eye, as such,

vI am aware, is not new.

I claim as my invention- The combination of the internal cylinder E andelastic material d within the shaft-eye A, the cylinder extending intoconnection with the shaft-eye, so that the shaft-eye, cylinder E, andelastic material will all turn together independently of the bolt,substantially as described.

GEO. F. SMITH. Vitnesses:

J. II. SHUMWAY', A. J. TIBBrTs.

